"Also known as the Vampire's Mace, the Mace of Molag Bal drains its victims of magicka and gives it to the bearer. It also has the ability to transfer an enemy's strength to its wielder. Molag Bal has been quite free with his artifact."
The Mace of Molag Bal, also know as the Vampire's Mace, is a Daedric artifact of Molag Bal, the Lord of Domination, Enslavement and Rape. Its enchantment drains the stamina and magicka of its victims and transfers them to the wielder. It has been said to be a good weapon of choice for slaughtering wizards.  Many legends surround the mace, but its origins can be traced back to when Molag Bal tricked an Orcish blacksmith and enslaved him in pits of Coldharbour. The blacksmith was turned into a Soul Shriven and forced to forge the mace.